6.46% is the change from 480 to 511
Calculation steps:
[( 511 - 480 ) ÷ 480] x 100 = 6.46%
Formula
Percentage change = [(511 - 480) / 480] x 100
Subtract the new number by the original number
511 - 480 = 31
31 ÷ 480 = 0.06458333333333334
0.06458333333333334 x 100 = 6.46%